Painting-machine.



F. D. STOWHE.

PAINTING MACHINE.

APPLICATION FILED FEB. 26. I9I4.

l,%89,738 Pmemedsept. 11,1917.

' 3 SHEETS-SHEET l.

F. D. STOWE.

PAINTING MACHINE.

APPLlcATIoN FILED FB.26. |914.

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PAINTING MACMNE.

APPLICATION Flu-:D FEB.26. 1914.

' Patented Sept. 11, 1917.

3 SHEETS-SHEET 3.

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FLOYD D. STOWE, OF WILMINGTON, DELAWARE, ASSIGNOR TO E. I. DU PONT DE. NE-

MOURS POWDER COMPANY, OF WILMINGTON,

NEW JERSEY'.

DELAWARE, A CORPORATION 0F PAINTING-MACHINE.

Speccaton of Letters Patent.

Patented Sept. 11', 1917..

To all 'whom t may concern.'

Be it known that I, FLOYD D. S'Town, a citizen of the United States, residing at Wilmington, in the county of New Castle, and in the State of Delaware, have invented a certain new and useful Improvement in Painting-Machines, and do hereby declare that the following is a full, clear, and exact description thereof.

My inventionl relates particularly to a machine adapted to paint detached ob]ects, but it is especially adapted for use in connection with painting kegs, such for eX- ainple, as powder kegs.

The object of my invention is to provide a painting machine in which the painting operation will be carried out entirely automatically. A further object of my invention is tov-provide an apparatus in which a supply of paint is continually fed to the apparatus in a uniform manner so as to maintain at all times the desired quantity of paint therein. A further object of my invention is to provide such an apparatus in which the object being painted is held at points which will interfere to the least degree with the painting operation.

While my invention is capable of embodiment in many different forms, for the purpose of illustration, I have shown "only one form thereof in the accompanying drawings, in which,

Figure 1, represents a side elevation of a machine made in accordance with my invention,

Fig. 2 is an end elevation of the same, and

ig. 3 is an enlarged vertical section of the pumping apparatus used in my invention.

In the drawings I have shown a paint` tank l which is supported upon a main frame 2 constructed in any suitable manner. At the top of the main .frame 2 there are located two sets of journal bearings 3 to receive a shaft 4 carrying a pulley 5, driven from any suitable source of power. The shaft 4 at its center has 'secured thereto a drum 6 which rotates within a semi-cylindrical trough 7 located in the main frame 2. This trough 7 has an outlet opening 8 which is normally closed by screw plug 9. At opposits sides. 0f. the drum 6 there are pro-4 vided two pairs of yokes or cradles 10, the yokes of a particular pair being located side by side on opposite sides of the drum 6. Each of these yokes has a circular inner surface 11 to receivea keg 12 or other object to be painted, and has also a rearwardly directed extension 13 to assist in removing the painted keg in the manner hereinafter described. One end of the keg 12 is retained in place during the painting opera- -tion .by a bung 14 which fits in the filling opening of the keg 12 and which is yieldingly pressed against the keg by means of a spring 15 which surrounds a slidingrod 16 attached to the bung. The sliding rod 16 is mounted on an adjustable arm 17 liaving slots 18 through which pass screws 19 for securing the arm to a right angle bracket 2Q attached to the inner face of the drum 6. The other end of the keg 12 is held in place during the painting operation by a lever arm 21 havingan adjustable notched head 22 screw threaded thereto and locked in position by a nut 23.' The lever arm 21 is pivoted to journal brackets 24 secured to the inner face of the drum 6. A spring 25 attached at one-end to an eyelet 26 in the right angle .bracket 20 and at the other end to an adJustable eyelet 27 secured to the lever arm 21 by nuts 28, normally tends to move the notched head 22 of the lever arm into engagement with the edge of the keg 12. Prior to the painting operation, however, and after the painting operation has been completed the notched head 22 of the lever arm 21 is disengaged from the end of the keg 12 by a cam surface 29 which cop crates with a roller 30 situated upon one end of the lever arm 21. When the painting operation has been completed the roller 80 coincides with a portion of the cam 29 and at the same time the keg 12 comes into contact with an inclined trip 31 so as to move the filling opening of the keg 12 out of engagement with the bung 14. It will be understood that for the pair of yokes or cradles 10, there is also provided a similar clamping mechanism to that already de scribed in connection with the yokes or cradles 11. During the operation of the painting machine a supply of paint is continually fed thereto in a, uniform manner from the tank 1 by a pump, 32. The pump. 32 has a piston rod 33 L-connected"to"av double"- cam 34 having upper and'lower camsurfaces 35 and 36. rlhe double cam 34 has a vertical slot-37v through which? theshaft4 passes At its'end4 the sli'aft'4 -carries-anouter arm 3S which is provided With a roller 39 to move the double cam 34 upwardlyandl downwardly by coperation with the cam surfaces 35 andy 36. The' shaft 4' also has at its end an inner arm hl'having; acircular1 outer surface 41, the purpose of which is to maintain vthepistonrod 33 atV eachfendot its path for alsufhcient'intcrvall of time'to' permit the pump to receive-its'l charge Aofi paint preparatorvto pumping the same` into r the trough 7.Vv The piston rod-33 isv hollow. and' has a piston 42 on its lowerfendwhicln operates ina cylinder 43 havingy `an:y annular outlet opening-.44 connectedl'byf means of al pipe45withfthe bottom of the-tank 1. Onli the topV ofthe cylinder 43 there isacylin'der head'46 from which-anY outer tube47 leads upwardly, surrounding they piston"'rodi33. The top of the outer tube 47l-.passes-intolau housing 48, in such-a manner as to extend a short distance' abovev the bottom thereofy. the tubey 47 beingt retained lin place by -nuts 49. Thehousing 48' has a lateralpassagef way 49a, which communicates withthe 4sidel of thetrough 7. AbovetheV end of the outer* tube 47 the piston rod -33' has attachedthereto a deflector platey 50, so as. tofdetlrectf thei paint flowing from the upperI endA of the tube 47 downwardly away fronroutletopenings 51, which are located' inl therpiston? rod' 33 immediately above thel deflector plate'O;y The deiiector plate 50 is Secured in positiolr by a screw 52 which is `screwed into ay de#- fvlector bell 53 :attached to the" piston rod'33" in any desired manner above the levelfcf they outlet, openings 511. Inlorder to` keep the paint continually stirredy up, I havel provided a pair of pivoted Stirrers54, piyo'tally supported in journal brackets in th'e in'- terior of the paint tankl. Eachuofltheser stirrers has anupwardly directed arm 56 to each of which thereiis-attacheda linlk! 572 pivotally connectedvto aileverV arm58 on ari `shaft 59; which is supported in journal brackets 60 aboye the top of` the tank' 1. Atl its end the shaft 59 has alever armflrfl which isconnected'by a link 62 t'othcld'ou ble cam 34; The paint'tank 1-has\af llin'g opening 63 at onerenditopermitthe supply: of paint tobe replenished. i

In theA operation ofthe machine the kegs Y 12 are placeddn the yokes or cradles 1K0 and 11 as they are moved upwardlyto 'the top. ofthe mach-inea the ykegs being placed iny such. a position vthat-the filling. openings registerwith the bungs 14.` Asil the kegsipassdownwar'dly the cam surface29 releasesthe lever arms 21l so as-to cause the springs 25V to-v move the notched heads 22 into engagement with the edges of the kegs. As the kegs are thus'` gripped between 4thc bungs 14s-l and the notched lieads 22'th'ey pass downwardly and are submerged in the body of paint present inthe`- trough" 7sof-as-to1be fcompl'etelyl com eredi thereby; Tli'elre'gsi thus. carried around o n the drum 6 until tli'efvpainting operatiorris*completed when the rollers 30 on Vt'he 'lever arms 21 coue into contact with the cam surfitce ^29, thus releasing the-notched heads22-froinengagement with the edges .of the kegs, and." the kegs are released from engagement with the bun-gs14k-byk coming..

into Contact withutheinclined trip 31.. The

kegs arefth-us carried-up-tofthe upper edge.`

of the trougln71whereafurther 1'otation,oi'-` the drum. `b` causes the rearwardly directed arms :134011. the fyok'es. on cradles 10k and 11" to pushy the painted kegsv over. thesedge offtheltrough7`, front \vhich.1they may be' conveyed in any suitable manner to any desiredlplace for the dryingfof .the paint., During the paintingr operation: ai supply o-ffpaint isy continuallyy fed. to the trough 7? in a uniform manner by the reciprocation. ofith'evpiston.

42 in the cylinder 43. Uponrtheupward.

stroke of the piston rodl33l the piston'rodfis mov-cd by thei Contact of.4 the roller. 39. `with the upper' camnsu-rfacea'fthe cylinder 43 abovethe piston 42 liztving 1,'` been 9 previously supplie'dwitlra-i charge of paint from-'the tank -1' throughf-the' pipel 45. and ,the`V annular` inlet: opening44 The paintl whichthus` flows in-toy the upper portion -ofthe' cylinder 43 is forced' upwardly between.- the outer. tube 47 andthe piston-rodg33 until it flows over the' topf4 of. the outer tube 47-r and? lar surface 41 of the arm 40 in order toffper-l mitthe painttec'oi-npletelyi ll the lower portion.. of. thel cylinder 43 beneaththe piel ton .42.A A Thereafterthe rollen 39 .cooperates with the lower cam surface 36 to move the" piston. 42. downwardly` thereby forcing, the

paint from the-lower` portion of thecylinder.Y f

43 upwardly throughthetpistonmrod. 33 andv out through theopenings. liwand'the pas-y sageway 49finto thet'roug-h 7.. Thepisto-n is now retained-for anrintervallofgtime at.

ated during the reciprocation by the link 62 be painted, including which is attached to the double cam 34.. l/Vhen necessary a new supply of paint may be introduced into the tank 1 through the supply opening 63.

While I have described my invention above in detail, I Wish it to be understood that many changes may be made therein without departing from the spirit of my invention.

I claim:

l. In combination, a paint trough, means for submerging in the paint therein kegs to be painted, including rotary clamping devices clamping the keg at the filling opening.

2. In combination, a paint trough, means 'for submerging in the paint therein kegs to be painted. including rotary clamping devices clamping the keg at the filling opening and the edge of the keg.

3. In combination, a paint trough, means for submerging in the paint therein kegs to be painted, including a spring-pressed, clamping device clamping the keg at the filling opening, and cam operated means for disengaging said device from said opening.

4.. In combination, a paint trough, means for submerging in the paint therein kegs to be painted, including spring-pressed, clamping devices clamping the keg at the filling opening and the edge of the keg, and means for engaging and disengaging said devices from the above mentioned parts of the keg.

5. In combination, a paint trough, means for submerging in the paint therein kegs to be painted, including rotary clamping devices, and means for moving the kegs out of engagement with the clamping means.

6. In combination, a paint trough, means for submerging in the paint therein kegs to be painted, including rotary clamping devices clamping the keg at the filling opening, and means for moving the kegs out of engagement with the clamping means.

7. In combination, a paint trough, means for submerging in the paint therein kegs to rotary clamping devices clamping the keg at the filling openingand the edge of the keg, and means for moving the kegs out of engagement with the clamping means.

8. In combination, a paint trough, means for submerging in the paint therein objects to be painted, a paint tank, means for supplying paint to the trough from the tank, and stirring means in the tank operated by the submerging means.

9. In Combination, a paint trough, means for submerging in the paint therein kegs to be painted, including rotary clamping devices clamping the keg at the filling opening, a paint tank, means for supplying paint to the trough from the tank, and stirring means in the tank operated by the submerging means.

10. In combination, a paint trough, means for submerging in the paint therein objects to be painted, including rotary cradles, a paint tank, means for supplying paint to the trough from the tank, and stirring means in the tank operated by the submerging meaHS.

ll. A coating apparatus which includes a holding device for kegs comprising a bung registering with the filling opening, and means for maintaining said bung in engagement with said opening.

l2. A coating apparatus which includes a holding device for kegs comprising a bung registering with the filling opening, and a device for clamping the opposite edge of the keg.

13. A holding device for kegs comprising a bung registering with the filling opening, and a pivoted arm having a notched head for clamping the opposite edge of the keg.

14:. A holding device for kegs comprising a bung registering with the filling opening, and a pivoted, spring-pressed arm havin a notched head for clamping the opposite ec ge of the keg.

In testimony that I claimthe foregoing I have hereunto set my hand.

FLOYD D. STOWE.

Witnesses ARTHUR WRIGHT, L. Bnonnnroi.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente. Washington, D. C. 

